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/*
 *
 *
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 *
 *
 * Copyright (c) 2000 World Wide Web Consortium,
 * (Massachusetts Institute of Technology, Institut National de
 * Recherche en Informatique et en Automatique, Keio University). All
 * Rights Reserved. This program is distributed under the W3C's Software
 * Intellectual Property License. This program is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY; without even
 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE.
 * See W3C License http://www.w3.org/Consortium/Legal/ for more details.
 */

package org.w3c.dom.css;

import org.w3c.dom.DOMException;
import org.w3c.dom.stylesheets.StyleSheet;

/**
 * The <code>CSSStyleSheet</code> interface is a concrete interface used to represent a CSS style
 * sheet i.e., a style sheet whose content type is "text/css". <p>See also the <a
 * href='http://www.w3.org/TR/2000/REC-DOM-Level-2-Style-20001113'>Document Object Model (DOM) Level
 * 2 Style Specification</a>.
 *
 * @since DOM Level 2
 */
public interface CSSStyleSheet extends StyleSheet {

  /**
   * If this style sheet comes from an <code>@import</code> rule, the
   * <code>ownerRule</code> attribute will contain the
   * <code>CSSImportRule</code>. In that case, the <code>ownerNode</code>
   * attribute in the <code>StyleSheet</code> interface will be
   * <code>null</code>. If the style sheet comes from an element or a
   * processing instruction, the <code>ownerRule</code> attribute will be
   * <code>null</code> and the <code>ownerNode</code> attribute will
   * contain the <code>Node</code>.
   */
  public CSSRule getOwnerRule();

  /**
   * The list of all CSS rules contained within the style sheet. This
   * includes both rule sets and at-rules.
   */
  public CSSRuleList getCssRules();

  /**
   * Used to insert a new rule into the style sheet. The new rule now
   * becomes part of the cascade.
   *
   * @param rule The parsable text representing the rule. For rule sets this contains both the
   * selector and the style declaration. For at-rules, this specifies both the at-identifier and the
   * rule content.
   * @param index The index within the style sheet's rule list of the rule before which to insert
   * the specified rule. If the specified index is equal to the length of the style sheet's rule
   * collection, the rule will be added to the end of the style sheet.
   * @return The index within the style sheet's rule collection of the newly inserted rule.
   * @throws DOMException HIERARCHY_REQUEST_ERR: Raised if the rule cannot be inserted at the
   * specified index e.g. if an <code>@import</code> rule is inserted after a standard rule set or
   * other at-rule. <br>INDEX_SIZE_ERR: Raised if the specified index is not a valid insertion
   * point. <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this style sheet is readonly. <br>SYNTAX_ERR:
   * Raised if the specified rule has a syntax error and is unparsable.
   */
  public int insertRule(String rule,
      int index)
      throws DOMException;

  /**
   * Used to delete a rule from the style sheet.
   *
   * @param index The index within the style sheet's rule list of the rule to remove.
   * @throws DOMException INDEX_SIZE_ERR: Raised if the specified index does not correspond to a
   * rule in the style sheet's rule list. <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this style
   * sheet is readonly.
   */
  public void deleteRule(int index)
      throws DOMException;

}
